Helpful; glad they provide it! A major plus for me is automatically managing the auth cookie (for age-restricted and private videos.) While it's not really much work to extract th ecookie from the website and manually import it into TubeArchivist (just like for yt-downloader), this sure does make it simpler, and keeps it updated when a new one is issued.

Oh, it also creates new Subscribe to channel and download video button on the YouTube website that automatically perform those actions in TubeArchivest. Very convenient.